转自原文 AE 线编辑
1、高亮显示节点
//高亮显示节点和端点 public void HighLightNode() { //清空 _mapCtrl.Map.ClearSelection(); _mapCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, _mapCtrl.ActiveView.Extent); var pGraphicsContainer = _mapCtrl.Map as IGraphicsContainer; pGraphicsContainer.DeleteAllElements(); _mapCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent); //增加 ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass(); ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass { Color = new RgbColorClass { Red = 255, Green = 0, Blue = 0 }, Width = 2, Style = esriSimpleLineStyle.esriSLSSolid }; ISimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbolClass { Color = new RgbColorClass { Red = 255, Green = 0, Blue = 0 }, Style = esriSimpleMarkerStyle.esriSMSCircle, Size = 5 }; switch (currentFeature.Shape.GeometryType) { case esriGeometryType.esriGeometryPoint: //IMarkerElement pMarkerElement = new MarkerElementClass(); //pMarkerElement.Symbol = simpleMarkerSymbol; //var pEla = pMarkerElement as IElement; //pEla.Geometry = currentFeature.Shape; //var pActiveView = _mapCtrl.ActiveView; //var pGraphicsContainer = _mapCtrl.Map as IGraphicsContainer; //pGraphicsContainer.AddElement(pEla, 0); //pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent); break; case esriGeometryType.esriGeometryPolyline: ILineElement pLineElement = new LineElementClass(); pLineElement.Symbol = simpleLineSymbol; var pEla1 = pLineElement as IElement; pEla1.Geometry = currentFeature.Shape; var pActiveView1 = _mapCtrl.ActiveView; var pGraphicsContainer1 = _mapCtrl.Map as IGraphicsContainer; pGraphicsContainer1.AddElement(pEla1, 0); pActiveView1.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent); break; case esriGeometryType.esriGeometryPolygon: IPolygonElement pPolygonElement = new PolygonElementClass { Symbol = simpleFillSymbol }; var pEla2 = pPolygonElement as IElement; pEla2.Geometry = currentFeature.Shape; var pActiveView2 = _mapCtrl.ActiveView; var pGraphicsContainer2 = _mapCtrl.Map as IGraphicsContainer; pGraphicsContainer2.AddElement(pEla2, 0); pActiveView2.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent); break; } //显示节点 //step1:创建节点符号 ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass(); pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare; pVertexMarkerSymbol.Size = 3; pVertexMarkerSymbol.Angle = 0; IRgbColor rgbVertex = new RgbColorClass(); rgbVertex.Green = 255; pVertexMarkerSymbol.Color = rgbVertex; ISimpleMarkerSymbol pEndPointMarkerSymbol = new SimpleMarkerSymbol(); pEndPointMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare; pEndPointMarkerSymbol.Size = 4; pEndPointMarkerSymbol.Angle = 0; IRgbColor rgbEndPoint = new RgbColorClass(); rgbEndPoint.Red = 255; pEndPointMarkerSymbol.Color = rgbEndPoint; //判D断要素的类型 if (currentFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline) { IGeometryCollection pGeoColl; ISegmentCollection pSegColl; ISegment pSegment; IPath path; IPointCollection pEndPointCol; IMultipoint pEndPoints; IPoint pEndPoint; pEndPoints = new MultipointClass(); pEndPointCol = pEndPoints as IPointCollection; pGeoColl = currentFeature.Shape as IGeometryCollection; for (int i = 0; i < pGeoColl.GeometryCount; i++) { pSegColl = pGeoColl.get_Geometry(i) as ISegmentCollection; path = pGeoColl.get_Geometry(i) as IPath; pEndPointCol.AddPoint(path.FromPoint); pEndPointCol.AddPoint(path.ToPoint); for (int j = 0; j < pSegColl.SegmentCount; j++) { pSegment = pSegColl.get_Segment(j); //show vertex AddPointSymbolToMap(pSegment.FromPoint, pVertexMarkerSymbol); AddPointSymbolToMap(pSegment.ToPoint, pVertexMarkerSymbol); } } //show endpoint for (int k = 0; k < pEndPointCol.PointCount; k++) { pEndPoint = pEndPointCol.get_Point(k); AddPointSymbolToMap(pEndPoint, pEndPointMarkerSymbol); } } else if (currentFeature.Shape.GeometryType == esriGeometryType.esriGeometryPoint) { IPoint pEndPoint; pEndPoint = currentFeature.Shape as IPoint; AddPointSymbolToMap(pEndPoint, pEndPointMarkerSymbol); } }
2、添加节点
OnMouseDown事件： IProximityOperator proximityOperator = ucDrawPanel.currentFeature.Shape as IProximityOperator; ptInsert = proximityOperator.ReturnNearestPoint(pPt, esriSegmentExtension.esriNoExtension); //step1: 创建节点符号 ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass(); pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare; pVertexMarkerSymbol.Size = 3; pVertexMarkerSymbol.Angle = 0; IRgbColor rgbVertex = new RgbColorClass(); rgbVertex.Green = 255; pVertexMarkerSymbol.Color = rgbVertex; //step2: 显示在地图上 IMarkerElement pMarkerElement = new MarkerElementClass(); pMarkerElement.Symbol = pVertexMarkerSymbol; var pEla = pMarkerElement as IElement; pEla.Geometry = ptInsert as IGeometry; pGraphicContainer.AddElement(pEla, 0); pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent); OnMouseUp事件，添加一个节点，但不打断线： // 注意：如果第三个参数createPart设为true，线会被打断，不可取 //线?splitAtPoint bool isSplitted; int newPartIndex; int newSegmentIndex; IPolyline polyline = ucDrawPanel.currentFeature.Shape as IPolyline; //插入一点，newSegmentIndex记录插入点的相对线的节点位置 polyline.SplitAtPoint(ptInsert, true, false, out isSplitted, out newPartIndex, out newSegmentIndex); ucDrawPanel.currentFeature.Store();
3、删除节点
OnMouseDown事件： //step1:获取预删除的节点 IPolyline pPolyline; IHitTest pHitTest; bool BoolHitTest; double dist = 0; double DbHitDis = 0; int LngPrtIdx = 0; bool BoolHitRt = false; hitElement = getElement(pPt, esriGeometryType.esriGeometryPolyline); if (hitElement != null) { pPolyline = hitElement.Geometry as IPolyline; pHitTest = pPolyline as IHitTest; ptDelete = new PointClass(); BoolHitTest = pHitTest.HitTest(pPt, pActiveView.Extent.Width / 100, esriGeometryHitPartType.esriGeometryPartVertex, ptDelete, ref DbHitDis, ref LngPrtIdx, ref indexDelete, ref BoolHitRt); // pHitTest.HitTest(pPt, pActiveView.Extent.Width / 100,esriGeometryHitPartType.esriGeometryPartVertex, ptDelete,ref DbHitDis, ref LngPrtIdx, ref LngSegIdx, ref BoolHitRt); if (BoolHitTest) { //step2:高?亮显示，符号黑色边框镂空填充 ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass(); pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSDiamond; pVertexMarkerSymbol.Size = 5; pVertexMarkerSymbol.Angle = 0; IRgbColor rgbVertex = new RgbColorClass(); rgbVertex.Red = 0; rgbVertex.Blue = 0; rgbVertex.Green = 0; pVertexMarkerSymbol.Color = rgbVertex; IMarkerElement pMarkerElement = new MarkerElementClass(); pMarkerElement.Symbol = pVertexMarkerSymbol; var pEla = pMarkerElement as IElement; pEla.Geometry = ptDelete as IGeometry; pGraphicContainer.AddElement(pEla, 0); pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent); } } OnMouseUp事件，删除节点： IPointCollection pointCollection = ucDrawPanel.currentFeature.Shape as IPointCollection; pointCollection.RemovePoints(indexDelete, 1); IPolyline polylineNew = pointCollection as IPolyline; StoreFeatureGeometry(ucDrawPanel.currentFeature, polylineNew); 保存图形要素： private bool StoreFeatureGeometry(IFeature pFeature, IGeometry pIGeometry) { try { var pFeatureClass = pFeature.Class as IFeatureClass; var pDataset = pFeatureClass as IDataset; IWorkspace pWorkspace = pDataset.Workspace; var pWorkspaceEdit = pWorkspace as IWorkspaceEdit; pWorkspaceEdit.StartEditing(false); pWorkspaceEdit.StartEditOperation(); pFeature.Shape = pIGeometry; pFeature.Store(); pWorkspaceEdit.StopEditOperation(); pWorkspaceEdit.StopEditing(true); return true; } catch (Exception ex) { return false; } }
4、打断线
关键字：Split。 OnMouseDown事件： IProximityOperator proximityOperator = ucDrawPanel.currentFeature.Shape as IProximityOperator; ptSplit = proximityOperator.ReturnNearestPoint(pPt, esriSegmentExtension.esriNoExtension); //step1:创建节点符号 ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass(); pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare; pVertexMarkerSymbol.Size = 4; pVertexMarkerSymbol.Angle = 0; IRgbColor rgbVertex = new RgbColorClass(); rgbVertex.Red = 255; pVertexMarkerSymbol.Color = rgbVertex; //step2:显示在地图上 IMarkerElement pMarkerElement = new MarkerElementClass(); pMarkerElement.Symbol = pVertexMarkerSymbol; var pEla = pMarkerElement as IElement; pEla.Geometry = ptSplit as IGeometry; pGraphicContainer.AddElement(pEla, 0); pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent); OnMouseUp事件打断线： IFeatureEdit featureEdit = ucDrawPanel.currentFeature as IFeatureEdit; ISet newFeaturesSet = featureEdit.Split(ptSplit); newFeaturesSet.Reset(); IFeature feature = newFeaturesSet.Next() as IFeature;
5、合并线
首先判断预合并的两条线拓扑关系，是否邻接关系；满足条件可以用关键字Merge实现，或者自定义方法，重新获取点的集合IPointCollection创建多线。